All good ideas so far, Nancy!
First, I'd stop worrying about this new problem. I have a similar one with Camellia. But let's begin by taking it for granted that Henry loves you very deeply. I'm SURE he does!
Indeed, the yawning is a sign of stress. I suggest you buy the book and DVD by Turid Rugaas on calming signals; the information there is so helpful.
You should be able to get these from Amazon.
Next trick of the trade: use tiny, tiny bits of treats, and give several after you complete one of these necessary, but unwelcome, sessions. At first, you can even give a few beforehand, but I'm not sure Henry will take them; Camellia won't, because she's SO sure I'm going to do something nasty to her - and she's right!
With us, it got so I had to block the dog door, and stop other avenues of escape from me. I'd hoped never to have to chase her down, but had to give up on that.
As much as you can, if you have to chase Henry down, keep your movements calm and easy, not fast or darting, if you can help it.
About the other ideas; I agree. Play little games with Henry, preferably, again, using tiny treats. These sessions can be short - five minutes, 10 to 20 tiny treats, should do the job. I'm using a clicker with Camellia, teaching her (shaping) silly tricks, like, first, standing on her hind legs and waving her forepaws up and down - you know what a common behavior that is in some dogs; especially small ones.
And, as mentioned before, I keep Camellia clipped down, which reduces grooming needs a great deal. Be prepared for Henty's buddies not to recognize him right away, if you clip him into a puppy cut or something similar - again, use tiny treats to re-introduce the dogs, if his buddies don't recognize him at first.
And try to give Henry as much as you can of his normal fun activities.
Please keep us posted, and ask any more questions that occur to you, and somebody here will likely have good suggestions! But I really want to reassure you that Henry still loves you. He's just determined to try to avoid the "bad stuff." I believe that in time, he'll accept the bad stuff from you better than he's doing now, especially if you use, say, three tiny treats after he's put up with it.
Oh; one other thing. YOU! Try to be cheerful and not to look worried. A major factor is, remember to breathe. We humans have a tendency to hold our breaths when we have tricky jobs to do. Dogs REALLY notice this, and I could describe their responses as, "Uh-oh; Mum is holding her breath; something is up - something I don't like!"
Wed, 4 Apr 2012 10:49:42 (PDT)