
I have toy breeds. And I think I own every type of feeder on the planet! From expensive to simple syringe.
It took a long time to find the right one for teeny mouths. It was cheap and cheerful Sherleys ( as in Sherleys Lactol) and they are only a couple of pounds from Pets at Home. Once I found that the tiny teats were just the job, I bought myself 4 boxes! I sterilise the teats and bottles, so always have free clean ones available.
While I appreciate that they wouldn't be any good for larger animals, they are just the job for my pups. :-)