What I've been doing for years, because stuffed animals for dogs don't have enough squeakers or grunts in them. Plus they cost too much.
I go to the second hand store, which usually has bu-ku stuffed animals.
You can buy them 50 cents each usually. Sometimes even less.
I buy what I think my dogs would like. I bring them home...throw them in the washer/dryer. I cut out the eyes & nose or any parts that dogs shouldn't have. I insert squeakers or grunts or both, as many as you want & sew them up.
Our dogs go crazy........
much safer & cheaper then the expensive stuffed animals for dogs that only have 1 squeaker.
You can buy bags of different size squeakers & grunts in a lot of online pets stores.
You can't beat it.