Uma can be picky sometimes. We usually call it her hunger strike. 
I think some of the time its simply that she doesn't like to eat alone. If I put food in her dish and walk away, she's going to walk away. If I put food in her dish and then hang out in the kitchen there's a much better chance of her eating. We've even gon so far as to move her dish into the living room when we are eating in there and she'll almost automatically jump on it. Social butterfly, I tell you.
The most important thing to note that our vet told us is that a dog isn't going to starve. Sometimes they just don't have big appetite. Don't worry unless Tegan seems depressed, extremely sleepy, etc.
I think some of the time its simply that she doesn't like to eat alone. If I put food in her dish and walk away, she's going to walk away. If I put food in her dish and then hang out in the kitchen there's a much better chance of her eating. We've even gon so far as to move her dish into the living room when we are eating in there and she'll almost automatically jump on it. Social butterfly, I tell you.
The most important thing to note that our vet told us is that a dog isn't going to starve. Sometimes they just don't have big appetite. Don't worry unless Tegan seems depressed, extremely sleepy, etc.