I went and read over the ingredients to what I think is the senior formula your lab is on. is this it? http://www.wellnesspetfood.com/product-details.aspx?pet=dog&pid=58
if it is, my first problem with it is that the protein is too low. senior dogs have a higher protein requirement to fight off catabolic responses in their bodies. secondly what is making you think she is still hungry? if in fact she is she might not be able to digest the grains and turn them into useful nutrients and energy. For me personally the only line I like from wellness is wellness CORE. it is the most species appropriate for any healthy dog with no known medical conditions. the gas could be from the protein source. i know someone whos dog has gas with pork so maybe for her it’s chicken.
