I type with a heavy heart and the support of several glasses of wine...

I have been distraught all day...completely distraught.  Our little Roscoe was making HUGE progress and we spent a very nice, fun, fur-loving weekend with him. Then, out of nowhere this morning he attacked my Lola the WonderCorgi.  Not once, but three times. The last time it took both Matt and I to separate them and he managed to bite her on one of her hind legs pretty good. It was horrid.  I have no idea what happened or why.  For the past 5 months they have been like twins...perfect pals and each other's playmate and shadow.  Then, for some reason this morning they had some serious dominance issues that apparently have not disappeared.  

We separated them all day--Lola inside, Roscoe outside.  By mid-afternoon I had convinced myself that it was a fluke, a puppy-spat gone wrong. When I got home tonight I let him in and within seconds he was on her again.  I was afraid I wouldn't be able to get them apart on my own (Matt wasn't home yet), but I managed to get them off each other.  Lola's front left paw now has a couple bite wounds and up until an hour or so ago she was limping pretty heavily. Now she seems to be getting over it.   My heart is just broken...and my eyes are all puffy,

I don't know if this is because of his hunting dog instincts, or if he is "becoming a man" now at 6-ish months and all the testosterone is resulting in serious dominance issues or what.  All I know is we can't have them together. So, with a very heavy heart and Matt's clear "man" thinking, we are going to have to find Roscoe a new home. Luckily we know several people who love his breed for hunting, so hope to have him placed soon.  But it still sucks...and I'm still crying...

(sigh)