|Hello from the Critique Club.
What a gorgeous cat Abigail is - and how she has grown! This photo is a pleasing study, and you have captured what seems to be something of the character of the young cat - an alertness, an inquisitiveness, perhaps a flightiness, certainly a cat who is its own master. I feel that capturing something of the subject's character is important in portraiture be it animal or human, otherwise it simply becomes a technical exercise.
The light is wonderful, and suits your subject perfectly - the darkness of the background emphasises the quality of the light. Your exposure is well controlled, and concentrates the viewers attention on the cat's face. I do wish the dark triangle to the lower left wasn't there; this, to me, is a real negative. It would also be nice if the cat was looking at least partially towards the viewer, although not at the cost of losing that sense of character.
My overall impression is of a pleasing pet portrait with good lighting. I am looking forward to seeing many more photos of Abigail!
If you have any questions, please feel free to send me a PM.