The puppies are born in the M-Bark. Happy, Garbage, Kira, Peoper and Loaf babysat the puppies.
How they would babysit puppies:
For the first time ever on the M-Bark, puppies are born! Everything is going great until the parents need to go on an important planetary mission. Since everyone else is busy, Happy, Garbage, Kira, Pepper and Loaf are given the job of babysitting them much to their chagrin.
Happy actually really likes puppies. He absolutely will be the one that ends up under a pile of sleeping puppies at the end of the day. He'd make sure they eat the healthiest food his paycheck can afford. Throughout the day he'd have a few in his arms and multiple clinging to him. The puppies really like playing with his ears.
Garbage loves puppies! They're cute, fun to play with, and will probably see him as their hero. He regales thim with tales of his adventures as captain of the Pluto and reenacting some of his battles much to the puppies' delight. He feeds them the only thing he can make, sandwiches, and eventually passes out on his bed with puppies all around him.
Kira would pretend to be annoyed about having to take care of the puppies but really she finds them so cute. She'd teach them important things they need to know like how to forage for food and how to recognize dangers in the wild -though its hard to do either of those on the M-Bark. She'll eventually wear them out with all the running around and she'll return a bunch of sleeping puppies to their parents.
Pepper is not too big a fan of puppies. Sure they're cute and have such tiny little paws but they're way too unpredictable for her. She'd do her best to keep them entertained with movies, toys, and food so she doesn't have to worry about them getting into trouble. At the end of the day she'll be sleeping through the credits of some movie with puppies curled up beside her.
Loaf is not at all happy to be a babysitter. He's constantly worrying over the puppies getting hurt. Though the day would almost be a nightmare, he'd actually later realize he faced a lot of his fears. He wouldn't do it again though.
All of them babysitting the puppies together would be chaotic. They'd probably keep the puppies in one of their apartments, Happy's maybe, so they don't lose track of them. Happy and Pepper will be trying to keep Garbage and Kira from getting the pups in trouble -aka letting the puppies get into everything, while Happy will be also trying to actually make the puppies their food. Loaf would probably end up fainting from the stress of it all.
The puppies episode was my favorite for a while so I made a gif specifically for this request. Let me know if it’s too fast to look at and I’ll replace it with something else.