I noticed the last few days that my dogs neck has been kind of red and the hair seems to be thinner. I thought it may just be the fact I have had the ecollar on her more the last few weeks. Well today I noticed the skin on her chest and one leg seem red and irritated with thinning hair. I am not sure if the hair is thinning or it just looks that way because of the redness and she is a shorhair with a white coat. I figure it may be some sort of contact dermatitis and starting putting hydrocortisone cream on her this morning to see if it helps. Anybody ever experience anything like this? Also she is on a cream for a yeast infection in her ears, but I don't think that could cause it.

It is interesting  you say that.  This all kind of started when I decided to buy the Pro Plan Beef and Rice instead of the usual Chicken and Rice.  I wouldn't assume there is much difference, but maybe that could be the cause.  I switched back to Chicken and Rice last night to eliminate that as a possibility. 

I have an appointment tomorrow morning at 9.  I will keep you updated.

Have you had him out in the sun a lot? My shorthair gets sunburned pretty easily if he's just out laying in the yard, soaking up the rays.