I live in a small house with 5 people inside. Years ago my cat had escaped the house and came back 1 week later. My mom won't let him inside and I feel bad for him. He usually waits for me outside of the door staring at me then when I go outside and pet him he starts purring. However, he only waits for me when my mom pets him too. He's been outside for over 7 years and he so far has no ticks but I can't tell if he has worms or other stuff.
How come my cat only waits for me to pet him? And how do I convince my mom to let him inside?