(in no particular order)
1. Train your Puppies by LittleMsSam Ever thought that puppy stage is cute but absolutely useless gameplay wise? Or simply wanted to spend some quality time with your adorable pup?
Now you can start teaching them some basic commands right from the start!
2. Rabbithole Veterinary by Zero Have you ever loaded your home lot only to see that your beloved pet has gotten sick? And now you have to go through yet loading screen and abandon the rest of your oblivious family members to their own devices? Just so you can go through the round of confusing and buggy interactions at the clinic you know better than your own home?
Say no more! With this mod you can simply click on the sick pet, choose the budget you want to spend on their medication, and send off your sim and pet into the void for a bit. They'll come back as good as new!
Beware that vets have working hours (going there at night is likely to fail in my experience). Also, the mod author added some neat tweaks and features, such as Dog Grooming Service—which acts as a substitute for a bath.
3. Meow-dern Cat Set by RAVASHEEN If you ever felt like default pet furniture cramps your style, or maybe you just want to spruce it up a little (nothing wrong with that)—this CC has your back.
It also helps to save some space by allowing your cat to sleep soundly on a shelf!
4. Antifear Training by LittleMsSam I really love the fears and obsessions that pets get (although I am usually not pleased to see a big dog to suddenly gain an obsession with my only toilet in a tiny home). However it does make me sad to see pets genuinely terrified of the objects I use every day!
Now every time you comfort your scared pet, they gain confidence to face and overcome their fears. Is it realistic? Idk. But certainly makes me (and the pets) a lot happier.
5. Go For Walk Fills Needs by LittleMsSam Simply put, this mod makes taking the time in your sim's busy schedule to actually walk your dog (and not just shoo it outside to poop on the pavement by themselves) finally worth it! (What. Like you haven't done it.)
6. Ask to Go for a Walk & Bath (Dogs) by LittleMsSam Still can not find the time to take good care of your dog, but it desperately needs some company? Ask your friends! /neighbors/family members/random people who come by your house for no apparent reason, invite themselves in and start drinking your orange juice.
7. Kids can go for a Walk with Dogs by LittleMsSam Maybe the adults are too busy. Or maybe you are playing a family with no adults at all. Time to start walking the dog is now!
8. Dog Walker & Dog Jogger by LittleMsSam If you want your dog to be taken care of and you have the money to spare, some sims would love to help!
9. Go for a walk with more Pets (Rabbitholes) by LittleMsSam If you have several pets who'd like to enjoy a walk, or perhaps you just don't want to micromanage their glitchy pathfinding or see the same route over and over, why not send them (and your sim) into the void? I mean, to...other neighborhoods or something.
An enjoyable and healthy walk without having to worry about getting your leash stuck on the pavement corner, with your dog helpelessly going back and forth like a broken roomba.
10. Working Pet Water Bowls by LittleMsSam After all that exercise it is important to hydrate! How come your sim takes a glass of water for themselves but doesn't pour any water for the dog? And yes, cats will also want some.
11. No Auto Put away Toys & Pet Toys by LittleMsSam Speaking of entertainment, if you like to see your pet's favourite squeaky toy on display near their bed, or perhaps you enjoy the elusive danger of stepping on one, check this out!
12. kardofe_Comfortable pets
A collection of very comfy little pet beds (both indoor and outdoor).
That's it when it comes to cats and dogs, now for a little extra...
13. Allergic to Fur and More Traits by ilkaSimming
Do you like seeing your sims suffer? Would you like to create some additional drama in your family, with some family members disliking the family pet? Would you like to fantasize about allergies being completely curable?
This mod has it all. This is a collection of traits with unique gameplay interactions, allowing your sim to be allergic/hateful/fearful towards pets/cats/dogs individually.
Allergic sims can avoid the pets, take medication, or even get cured (if you so wish). Fearful sims can go to therapy. Hateful sims can make an exception for one particular pet who stole their heart.
14. Feed Your Pets collection by ilex: Feedable Fish, Feedable Frogs; Feedable Live Aliens; Water Your Plants If your taste in pets is a bit different, or if you are low on space and/or time, or perhaps you just want even more everyday responsibilities for your sim—you can always get them a fish! Or a frog. Or a low-effort plant. Or, if you don't mind possibly breaking several intergalactic laws, even an alien.
That's it for pets today! What pet do you usually get? Can you think of any pet related challenges to impose on yourself? Don't forget to take good care of yourself first.
All images are taken from mod pages, therefore belong to mod authors, as do the mods, ofc.