I feel the reason why people are troubled about all this is simple. It's because so little is known. It's all gaps. And people are projecting into the gaps all sorts of things that may not have been there at all.
To take one thing - Barbara's mood at the kennels. If she was cross, irritable or unhappy - and we don't really know as there's only one person's impression, and I don't think we even have a first-hand account .... Anyway there could be a hundred and one reasons behind it, and it might have been nothing to do with the dog, the husband or the outing. Yesterday I got a credit card statement in the post and it had a large payment on it that I'd clean forgotten about, and that put me into a low mood every time I thought of it because I thought the money had been taken already. You know? There are all sorts of things that get us down. Or maybe she just had a headache.