Possibly allergies?

The imp has been a right little pain in the ass, lately.  Mean to his sister, the kittens, and really rough with the puppy.

When he got up this morning, I noticed that he had the heel of his hand pressed into the spot just beneath his eyebrow, just above the orbit of his eye, like he had a sinus headache.  He looks like a little minature Odysseus, and Odysseus has horrible allergies.  So, I wonder...I wonder if the imp is also suffering from the same vicious hay fever, and taking it out on everything around him. 

I'm giving both of them a dose of Benedryl tonight, to see if the meanness is because of a sinus headache that the Tylenol and Ibuprofen aren't touching.  (Pixie has about half a dozen mosquito bites that the external cream ain't doing anything for--and she's whiney about it.)