UPDATE: Chicago Basement Cat Sheds 5 Lbs. of Matted Fur and Now, Finally …

It’s truly amazing what a haircut can do.

Sinbad the cat, who was found in the basement of an elderly man’s home back in December, was carrying 5 lbs. of filthy, matted fur.

The Anti-Cruelty Society‘s humane investigation team received a phone call from a municipal worker concerning the cat who was living — if you can call it that — down in a basement on the south side of Chicago, a shelter spokeswoman told PEOPLE.

“Our humane investigation team went to the location and spoke with the owner of the cat,” says PR manager Colette Bradley. “He was an elderly man whose mental health was failing and he couldn’t care for the cat. Our humane investigators asked him if he would be willing to relinquish the cat into our care and he agreed. We brought him into our facility and began to shave the 5 lbs. of matted hair off of him. It ended up taking two shaves.”

Just as startling as the cat’s physical transformation was the brand new personality that emerged once the cat was cleaned up.

“As soon as that hair started coming off and he could walk, he started rubbing up against the people in the room,” Bradley told PEOPLE. “He was so affectionate and was looking for love in return. We were all shocked by how friendly he was considering he had such limited human interaction in his life prior to being rescued.”

With the garbage-filled fur removed from his body, the cat weighed in at 6.63 lbs. and could definitely stand to gain more. Thanks to a new diet, Sinbad now weighs 7.25 lbs., the shelter says, and continues to make huge strides in the new year.

“He started using the litter box quickly which was fantastic since we weren’t sure he had ever had one or knew how to use one,” Bradley stated. “At first, his back legs were atrophied and he was having a hard time walking around without falling, but within a few days he had built up the muscles in his legs and was able to jump up on furniture.”

UPDATE: Sinbad was fostered in-house at the Anti-Cruelty Society for a number of days until an employee named Elliott Serrano volunteered to take him home for Christmas — and that’s when a foster home became a forever home.

“They both decided pretty quickly that he was there to stay,” stated Bradley. “His hair is growing in really well now and is so soft! He loves to lay on Elliott’s chest and purr. He’s very happy in his new home and is really thriving!”

Sinbad now has his own Instagram page that tracks his style adventures — an outfit with purple sequins is not to be missed — and snuggly naps.

If you wish to help more animals available at The Anti-Cruelty Society, click here.

h/t: people.com