From the puppy's point of view: have a pack of 'dog-friendly' Labradors run up to you and you acquire PTSD for life about dogs. What we call 'dog-friendly' can very well be bully behavior. Depends on how educated the day care employees are about behavior. The fact that they admit an 8 week old doesn't show this IMO.Everything I've read says it is pertinent to get a puppy socialized by 4 months old. I complied with August and I don't believe he had any negative experiences at this doggy daycare. All the dogs there are vetted and all are dog friendly. Despite all his socialization and again I never saw anything negative,he is mistrustful of dogs. I think it might have been different if I had continued the socializing,but early socialization was not a magic cure.
Pups learn dog behavior from their mother and sibs and therefor should spend ample time with them until they are at least 9 - 10 weeks old.