I have a very fluffy Newfie pup (she's nearly 4 months old). Because she's such a fluff ball it's really tough to put her collar on, especially when she's trying to eat it. I plan to move to a harness once she's bigger anyway but maybe that would be easier than a collar now?
Are there harnesses that grow with a dog? She's growing so fast that I'm worried about wasting money if I get one now.