Our 5mos old Mo is like a vacuum cleaner on his walks, anything and everything goes in his mouth. We usually try to exchange for a treat and have been trying to teach 'Drop it'. But, he is not getting it and will often growl at myself and the kids if we attempt to go near his mouth. I'm worried that he will swallow something dangerous or that it will get lodged. Also, not loving the fact that he is growling at us? Any tips would be welcomed. I have searched resource guarding on here as well. We were in puppy classes until they were cancelled due to lockdown (We are in Ontario). But I may be able to have the trainers come to the house in our backyard to help teach him to "drop it".