My two daughters desperately wanted to swim with the dolphins in Kas when we saw a trip advertised from Calis last summer. I had some reservations, but we decided to go as the girls were so keen. The day before the coach trip, we were told that the time allotted to each child suddenly went down from "about 10 minutes each" to "about 2 minutes each" as it meant they could squash more people onto the trip! This is the point when we tried to drop out of the trip, as we felt we were being ripped off. (I think the dolphin part was about £50 each, on top of the price of the coach journey.) The bloke selling the trip was the only Turkish person we have come across with a real nasty attitude. He refused to give our deposit back (refusing to even speak to us face to face - in stead putting some poor lad in the office to deal with us). He eventually (by phone) dropped the price to try and keep us on the trip. My sister in law desperately wanted to treat the girls as they were bitterly disappointed at possibly not going.
The girls thoroughly enjoyed the swimming experience (they eventually had about 8 mins each, which was plenty of time) but both were very upset about the conditions the dolphins were kept in, especially when we were told that dolphins out in the sea swim for miles and can jump extremely high. We all left there feeling quite depressed.
Definitely would not go again and would not recommend it - it just seemed so cruel. The pool they were kept in was a tiny fenced-in area. The following day we went on a boat trip for the day from Calis, and saw dolphins out in the sea. They were jumping in and out of the water, and seemed so happy compared to the one at Kas, who looked very sad and had to be bribed with food to keep going.