My 5 month old border collie bites?

give him a chew toy... its very common that puppies bite since their teeth are just growing...

Yes give him a hard toy, after a while rub you're hands on it so he will think hmm my owner is hard to bite maybe i shouldn't so try that i have one to border/collie part lab so if it doesent work which it should i will try to contact this to you again.Thanks for reading