The Summer King chronicles: Yes! I loved it.
Watership down: No, but I've watched episodes on Netflix, may read it someday
WoF: Absolutely, pretty cool as well.
Survivors: One of my favourite series! I didn't expect it to be at all.
Seekers: Yeah, too much traveling but still good and entertaining.
Bravelands: Yes, the ending was the saddest ever but it was amazing.
Owls of Ga'hoole: Nah not really. Maybe one day.
Wolves of Beyond: It was good I guess.
Bambi: I expect it to be like Disney's movie. But no.
The Wolf Chronicles: Never heard of it, may try it out.
Foxcraft: Yeah! Cool lore and stuff
The Guardian Herd: Yes.
Tailchaser's song: Yeah, good old story
Firebringer: I've just read it a few weeks ago, fire wasn't a big part of the story though, kinda disappointing.
The Sight and Fell: No, but I plan to do it this summer
Ratha's Creature: Yeah. Glad there weren't any humans.
Recommended books: Sword bird, not the best but it was fine. The Lost Rainforest. Spirit animals( Even though the main characters are humans, it still has a very good story, check it out) Silverwing(about bats, has four or three books, the last one is the most interesting for me. In the first and second book it may seem that it's directing towards humans, but it takes a turn) Bears of the Ice, from the author that made Wolves of Beyond and Guardians of Ga'hoole. The Last Dogs, may not be the best as it kind of has to do with humans, but I'd try it out.
I'd really like lions as POVs as well as cats, but I have Warrior so I guess it's enough( I'm also trying to write a series rn, it's going slow but you can read a couple of chapters if you'd like)
Overused? I really don't know, but I'd say wolves . Underused? Almost every animal.
Types of plots? Anything that tells the story well enough.