A Beginner's Guide to Pet Rat Care

What I've learned from raising rats at Sundae Morning Rattery

TL;DR: Rats are smart and social little animals, so never keep just one. You'll want a big multi-level cage, a quality lab block as the staple (I recommend Oxbow or Mazuri) with fresh veggies and a little fruit on the side, and plenty of enrichment plus at least an hour of out-of-cage time with you each day. Keep all fragrances away from their sensitive lungs, do regular health checks, and find an exotics vet before you need one. Everything below breaks it all down, but if you've got those basics you're off to a strong start.

Pet rats are some of the most intelligent and affectionate animals you can share your home with. They thrive on companionship and interaction, and with proper care they become deeply social pets that genuinely enjoy time with their humans. In this guide I want to share what I've learned about responsible rat ownership so you have a solid starting point, covering housing, diet, enrichment, health, and the daily care that keeps them well.

Why You Should Never House Rats Alone

You should always keep rats with other rats, because they are profoundly social and depend on companionship for their mental wellbeing. Both in the wild and in captivity they form complex social groups, and I've seen how quickly loneliness and stress set in when a rat lives alone, often leading to behavioral problems. At a minimum you'll want two rats of the same sex together, and in my experience small groups tend to do even better.

Housing and Cage Setup

You need a spacious enclosure where your rats can climb, explore, and sleep comfortably.

A good rat cage should have:

Multiple levels
Solid floors rather than wire

Good ventilation

Secure doors with narrow bar spacing

Plenty of climbing opportunities and clutter so they feel safe

Rats are active animals, and larger cages make a real difference to their welfare. My understanding is that you should aim for at least 2 cubic feet of space per rat as a minimum, though I always lean toward more space whenever I can.

Cage Setup Essentials

When you set up an enclosure, make sure to include:

Hammocks
Hideouts
Climbing ropes or ladders
Chew toys
A litter box
Nesting material such as paper or tissues

I've found that offering different textures and climbing options really helps keep rats mentally stimulated, so try to give them plenty of variety.

Safe Bedding

Rats have sensitive respiratory systems, so you should be careful about the bedding you choose. I set up my enclosures to allow for deep bedding, usually between 2 and 4 inches deep, and I'd recommend you do the same.

Bedding I trust:

Aspen or kiln-dried pine bedding
Hemp bedding

What you should avoid:

Cedar
Pine that isn't kiln-dried
Dusty bedding
Fleece or blankets as substrate
Paper as a primary substrate

From what I understand, these materials can either release harmful aromatic oils or allow ammonia to build up, and both will irritate a rat's respiratory system.

Diet and Nutrition

Rats are omnivores, and they do best on a varied diet built around a balanced staple food with fresh foods added in.

Staple Diet (Lab Blocks)

You should definitely make sure to feed your rats a high-quality lab block or pellet made specifically for rats, and I typically recommend Oxbow or Mazuri. The majority of the diet should come from this staple, because it provides balanced nutrition and stops rats from picking out only their favorite bits.

The ones I reach for:

Oxbow Essentials Adult Rat Food
Mazuri Rat and Mouse Diet
Teklad/Harlan lab blocks

Keep staple food as the foundation of the diet and treat fresh foods as supplements.

Fresh Foods

Fresh foods add enrichment along with extra nutrition. These are the ones I rely on, and any of them make a good choice for your rats:

Vegetables:

Broccoli
Kale
Carrots
Peas
Bok choy

Fruits, in moderation:

Apples
Bananas
Berries

Protein treats:

Eggs
Cooked chicken
Plain lactose-free yogurt

You should always make sure your rats have fresh water available from a water bottle.

Foods You Should Avoid

Some foods can be unsafe, so you'll want to keep them away from your rats entirely. I'd encourage you to read more thorough lists online too, since there is sometimes disagreement in the community about what is and isn't safe.

What you shouldn't feed:

Raw beans
Alcohol
Caffeine
Very salty or sugary foods
Lactose
High-fat foods such as too many seeds or oils

Feeding a balanced diet and limiting treats is how you'll help prevent obesity and the health problems that come with it.

Enrichment and Mental Stimulation

Rats are remarkably intelligent, and they need enrichment to stay happy. A well-enriched cage might include:

Hammocks
Tunnels
Climbing ropes
Foraging toys
Wooden chew toys
Dig boxes

You should also give your rats daily out-of-cage time to explore and interact with you, aiming for at least one hour a day and more whenever possible, as long as they have food and water available to them. Without that stimulation, I've watched rats grow bored and stressed.

Handling and Socialization

In my experience most rats become very affectionate once they're handled regularly. Here's what I'd recommend when you're bonding with them:

Give new rats a few days to settle into their home
Use treats to build positive associations
Always support their body when lifting them
Never pick a rat up by its tail
Handle them with confidence, picking them up when needed while also letting them choose to come to you
Offer a dark and cozy spot like a hoodie pocket or blanket so they feel safe with you

I've found that regular handling is what builds trust and strengthens the bond over time, so the more consistent you are, the better.

Health and Veterinary Care

Rats have short lifespans, but I want to be clear that this doesn't mean you'll simply find them passed away in their cage at the end. It can happen, though it isn't typical. What I've learned is that rats are fighters and will hide infection and illness for as long as they possibly can. That's why you should do daily health checks, so you can catch problems early and give them the best chance at treatment.

Their lungs and noses are extremely sensitive. You should never use candles, diffusers, fragrance, essential oils, or Febreze anywhere your rats might smell them. I clean my cages with fragrance-free dish soap, and I've found an air purifier helps filter out toxins for them. Even all-purpose cleaners can bother them. My rule of thumb is simple: if you can smell it, they can smell it far more strongly.

Common Health Issues

These are the issues you'll want to watch for most often:

Respiratory infections
Tumors
Parasites such as mites
Abscesses, cuts and scrapes
Dental issues
Soft stool or changes in stool

Signs of Illness

Keep an eye out for these signs that something is wrong:

Sneezing or noisy breathing
Weight loss
Lethargy
Lumps or swelling
Red discharge around the eyes or nose, known as porphyrin
Squinted eyes or side sucking

If you notice any of these, get in touch with an exotic animal vet promptly.

How to Do a Health Check

This is the routine I follow, and I'd recommend you work through the same steps:

Weight. Weigh each rat on a kitchen scale and record the weight in grams. An adult rat shouldn't be rapidly dropping or gaining weight.
Spine and hips. Feel along the spine and hips with firm pressure. They should feel strong and stable, so watch for a bony spine or thinning skin.
Eyes. Check that the eyes are wide open and bright, with a clear shine to them. Watch for dullness, discharge, crusties, or injury.
Ears. Look inside the ears for discharge and smell them for any sign of infection. I also feel around the jaw and under the ears for swelling.
Rat phone. Hold the rat with the side of its ribs against your ear and listen to its breathing. It should sound like a whooshy helicopter. You don't want to hear crackling, bubbling, popping, or wheezing.
Teeth. Hold the rat up and gently pull the chin skin down to look at the teeth. They should be flat across both ends rather than skewed or angled.
Lumps. Run your hands down both sides of the rat to feel for anything unusual.
Feet and nails. Look for injury or overgrowth.
Genital area and tail. Check for swelling or injury. With older males, you may need to slide back the sheath of the penis to check for buildup.
Behavior. Watch how they move. A healthy rat is bright, moves confidently, sniffs around, and makes no breathing sounds. They shouldn't wobble or hold a head tilt, and they should be able to sit up and hold food with both hands.

If anything comes up during a health check, call your vet and book an appointment right away.

My Daily and Weekly Care Schedule

This is the routine I use at Sundae Morning Rattery, and it's a good framework for you to build your own around.

Daily, morning:

Check food and refill lab blocks if needed
Refresh water bottles
Remove any spoiled food
Give medicine if any rat needs it

Daily, evening:

Refill lab blocks and add fresh food
Spot clean the cages
Free roam and social time, with a minimum of one hour of supervised out-of-cage time
Health checks
Give medicine if any rat needs it

Every other day:

Change litter boxes
Replace or wash hammocks
Remove heavily soiled bedding

Rats tend to favor certain spots, so those areas will usually need cleaning more often.

Weekly:

Remove all bedding
Wash cage surfaces
Clean shelves and accessories
Replace bedding
Wash hammocks and fabric items
Order groceries with the rats' fresh foods in mind

Doing a full clean each week is how you keep ammonia from building up in their urine, which would otherwise irritate their airways.

Introducing New Rats

When you add new rats to an existing group, you should take introductions slowly to avoid conflict. Here's the process I follow:

Quarantine new rats for 2 weeks in a separate room
Introduce them in a fully cleaned, small carrier with supervision
Once they relax and start sleeping in the carrier, usually after a few hours, move them into a slightly bigger, fully cleaned cage
When they show full bonding behavior such as rat piles and snuggling, move them to a larger cage. This can take anywhere from a few days to a few weeks, and you shouldn't rush it
Finally move them into the full-size, fully cleaned permanent cage

Some minor squeaking and pinning is normal while rats sort out their hierarchy. I'd strongly encourage you to do plenty of research before introducing rats, since this is only a summary of one method I use.

Free Roam Safety

Before you let your rats explore outside their cage, rat-proof the area:

Cover electrical cords
Block small holes or gaps
Remove toxic plants
Keep other pets away

Rats are natural chewers, and I've learned they can squeeze through surprisingly small spaces, so be thorough.

Choosing a Responsible Breeder

From everything I've learned, a responsible breeder focuses on health and temperament alongside proper socialization. When you're choosing one, look for breeders who typically:

Handle babies appropriately
Select for temperament
Provide lifelong support to adopters
Offer guidance on care and introductions
Maintain clean housing and proper nutrition

Ethical breeders also make sure rats go to appropriate homes, and they never adopt a rat out alone.

Sources and Further Reading

Rat care is constantly improving as we learn more about what works best for our little buddies. It is important to read up as much as possible from reputable sources. There is sometimes disagreement in the community, so please do your research and try to understand why we do things the way we do!