[header] How to care for a jack russell [title] Feed your dog a high quality dog food each day. [step] Jack russell terriers need to be fed twice a day. You should not free feed a jack russell, as they're prone to overeating. 
In general, jack russell terriers need about 1.25 to 1.75 cups of quality dog food each day. Calorie amounts vary between brands of dog food, though, so check the feeding instructions on the food packet so you aren't overfeeding or underfeeding your jack russell terrier.