What if a client wants me to do two visits for two cats? Do I charge for two drop-in visits per day and for the additional cat?

If you have a base price for one cat plus a nominal fee for a second cat, you would charge two visits at your two cat rate.

If you have not already set up such a rate structure on your profile, you can adjust the price up or down to become what you think that would likely be and modify your profile later.

Yes, you would charge for 2 visits a day. Like Carmen said, the rate will depend on what you have set in your profile. I usually charge $15 for cat care for 1-2 cats if they are the only animals, otherwise it's $5 for cat care in addition to the other animal charges.