I'm considering adopting a 2-month old adorable Pembroke. I've never had a Corgi before, and I just had a question. From the picture I have he looks healthy, but his breeder advertised as "Marked-Down $300!". Is he unhealthy? I think he may just be the runt, should I look out for anything? The breeders have had very good reviews in my state, so that's not what I'm worried about. Any pointers would be so appreciated!