You can use variable blocks to monitor how your pet is feeling.
For example, to monitor if your pet is hungry, go to Data and click on 'Make a Variable.' Type in something like 'Hungry.'

You can use a script like this so that your pet gets hungrier over time:

To make it less hungry, add this block to the 'when I receive food' script:

You could also monitor if your pet is thirsty, sleepy, or bored.
Next, share your pet