I find that home cooking is easier and healthier. I give them 1/4 cup twice a day and they never leave a crumb.
As for the coat you should always use a good conditioner. I use #1 All Systems shampoo and conditioner. I add a little bottle of hot oil treatment to the conditioner, work into all the hair and wrap in a warm towel for 15 minutes. Be sure to brush every day with a really good brush. I use the Chris Christionson brush because the little round knobs at the tips are not put on seperately which will stretch and break the hair and also pull it out by the roots. If you run into a stubborn mat, spray it with a detangler spray and use a slicker brush on it.