My catle dog mix, Ixa, is obsessed with the raccons who have been nested in a huge cypress tree in my backyard for a few years. Ixa spent part of last night and most of this morning glued to the tree, circling it and watching excitedly. Before I blocked their acces, Ixa would wake me up many nights with growling and barking excitement when spotting the racoons move across the front yard. She's got a dog door to the back, so she can patrol more directly there, without barking.
Before the racoons, the obsession was a squirrel, Ixa would sit in the yard and stare at it or pace underneath where it sat on the power lines.
At first I figured it was great that whe found herself a job to do in the yard: critter patrol. I wasn't really worried about it till recently, especially this morning, when she didn't even seem interested in breakfast, in favor of keeping up her vigil out back with the racoons. When I'm home, she usually hangs out in the house with me, so her critter vigils are not constant. I don't know what she does when I'm not home. It seems to be more when the racoons/squirrels are active.
How much critter patrol signals an unhealthy obsession? Is it a matter of time spent? Certain behaviors?
Should I block the dog door at night, and remove her access to looking out back to get it off her mind?
Will the racoons eventually get tired of her harrassment and move on? (that would be great to help my flea control)
What should I do, if anything?