My 13-yr-old calico, Heidi was diagnosed with a tumor in her liver and mass in her chest a few months ago and was on medication to help with pain. She's been getting around fine but lately it's gotten worse.
We noticed last night that her mouth/lips looked discolored, like a dark brown place and are really puffy/swollen. She keeps licking her lips and mouth but won't hardly drink or eat at all. She barely goes to the bathroom anymore either. She basically lays around all day but she can get up and isn't stumbling or erratic behavior.
What could cause her mouth to be like this?
We noticed last night that her mouth/lips looked discolored, like a dark brown place and are really puffy/swollen. She keeps licking her lips and mouth but won't hardly drink or eat at all. She barely goes to the bathroom anymore either. She basically lays around all day but she can get up and isn't stumbling or erratic behavior.
What could cause her mouth to be like this?