I have a beautiful 7 year old black cat and I would like to reinforce his Cleaning and Protection, because unfortunately I live with two people who are very negative and I felt their bad energy reaching my cat.
In addition to a lot of affection and attention, I reinforced his Aura Cleansing by doing Aura Cleansing, Aura Cleansing with Satanic Fire to burn the negative energies of his aura, soul and chakras, I do the Ansuz Runa for Aura Cleansing, I do Aura de Protection and I program his Protection Aura.
I saw in a post that I can do Suryae and Raum to clean and protect him, in this case it would also be 108 vibrations ??
And I wonder if there's anything else I can do for him.
I think those already sound like very good protective measures :)
You can do Raum for whatever amount you prefer. Since it's a mantra of Sun energies, 111x would tie into the energies of the Sun further. 108 also works, as would 36, 54, 80, 88, and so on. Even low amounts may suffice easily, so 36 for example would be a completely valid choice. Be gentle with animals as their souls are different from ours. Always good to take it easy on them so as to not overwhelm them or cause damage. 36 is very likely enough.
There is one more thing, but it would require some money which you mentioned in the other post you are short on currently. But I will still include this for later on once you have improved that situation.
What you can also do is to get him a comfortable and nice collar that you can attach something to, and then get a black tourmaline gem. You can use the Algiz rune together with this gem to program it to protect your cat, and then afterwards attach the gem to his collar.