R.S.
We ude Plano 4 Paws in Inn at Coit and Parker. Nice folks, great prices, and they believe in doggy day care for any well socialized dog at no additional fee. It's $18 - $22 depending on dog size. http://www.planos4pawsinn.com/
On the pricier end there is a place that would probably be great for long term (except for it being more expensive) Doggi'e Wonderland at Alma and Plano Pkwy. They only kennel dogs at night and the rest of the day they have free reign of a big property with play equipment and a pool (looks like a kids summer camp)It's $25 - $50 a day depending on crate/kennel size. http://www.thedoggieswonderland.com/aboutus.html