Is it safe for a puppy to go to the park with its mother if it has had no shots?

He is nuts. They got a good shot of her immunity with the first milk, the colostrum, when they were first born. They also got some immunities from nursing from her. But, they were getting weaned from her four weeks ago and that means their protection from mom has been lessening since then. When a litter is in a well controlled environment, such as a responsible breeder's home, it is best to wait as long as possible before vaccinating. That usually means they get vaccinated at nine weeks, after having been kept in a clean, controlled environment. Many breeders have visitors either wipe their shoes with a bleach solution or leave the shoes outside, and then wash hands before even being in the same room as a litter. Compare that to this park guy. He's delusional.