Oh,do you call it a "sketch"? I'd call it a masterpiece completely inspiring and well done with great technique and own style,resulting in art and beauty in the eyes of the beholder. As I'd say sometimes it's "M-E-G-A-!" beautiful (means "Mega-Extra-Giga-Amazing-!ncredible)!
The way you did her colors vivid shows how live and hot her colors are like the strong sun,the way you did her red markings is perfect and soft,and the way you did some parts of her red markings darker and lighter make a great auto shading in the whole picture,it's very smart of you. Her fur is absolutely amazing,really shows how fluffy she is and how her fur get more stuffed in Winter and Autumn,its style is also unique and it's very nice,I can see that you made smart shading in fur's details there too. About her anatomy I can't say too much otherwise than it's 100% her pyshic and way,and you're getting even better! Her nose and paws are so realistic and cartoonist at same time! But you deserve attention in her expression and eyes,that are simply cute and interesting,she's so fantastic there!
The details of blue outline and Autumn leaves gives the picture a strategic beauty and make the own background,don't needing trees or floor. I also would like to say so that you made her markings perfect so,because many people can't. I know her design is a bit complicated,sorry!
So for ending the whole picture is charming and cute,and awesome first off all,the best ones were the smart shading,the markings and the leaves and outline details. I don't liked it,too far,I am feeling in love with this artwork!!!
Thank you very much a billion times,I loved it! And also thanks for being this already good friend you are,incredible friend I would say. And sure you're welcome buddy!
But now you just discovered that I was (am yet) doing a gift to you too,it was a surprise too,I not even added it to my To Do List! Ya naughty!
Lol and looks like I've made another critic,big one this time haha! My apologies about if it is a bit hard to you think in what reply,but I may wait any time hehe.