Weekly excessive Panting and neediness
I have a 5-year old female chihuahua. She's about 4lbs, and is not fixed. I work from home now and I noticed that once or twice per week she starts panting excessively and becomes extremely needy. She won't leave me alone unless I pick her up, and when I do she tries to crawl on top of my head and won't let me put her down. This is very strange for her, because normally if you pet/touch her too much she tries to bite. When she's in this state, I can pet her all day.
After several hours this behavior will dissipate, but I'm concerned that there might be a problem. I'm hoping it's just hormonal since she hasn't been spayed. Has anyone seen this behavior before?