I have two ducklings..both were born on August 16th 2010..so they are about 3 weeks old. One is a Cayuga named Dawn. She is a female. The Other is Buster, who is a Pekin. So during day time..i put them in my back yard with a little dry grass in a corner where they like to sit. and every day i give them a mixture of tomato and cucumbers chopped into very very little pieces+their water+their non medicated feed. all separate obviously. At night however I put them in a plastic pond..its a 150 gallon pond and it is about 47-50 inches long which gives the ducklings big enough space to roam around and its not filled with water..its just used as a place for them to sleep in. once i put them in..i again take some dried grass and put it in the corner for them to sleep on, notice there is no bedding on the pond floor..its just plastic. their non medicated feed is is set aside and so is their water. every morning i wake up to find that pond in its messiest state..so every day i clean it. now here are my quires. 1) is it ok for me to spread kitty litter or sand all over the tub as their bedding? Is it safe for them?? Will they consume it? If they do, will it cause problems? 2) How often do I have to clean the tub filled with kitty litter/sand? Do I have to dump all of the sand and fill it up with new, fresh sand or i can just clean up the lumps? Will it be sanitary for ducks to be in the same sand the peed and pooped in? 3) few of my friends are telling me that the tomato and cucumber mixture is not good every day..it should be given weekly or like twice a month as a treat. whats your take on this? 4) also i have been asked not to provide them with food constantly..they should be given food every three or four hours..and once given, the food should be in their enclosure for about an hour..and then taken away..i don't know if i should follow it or not..so need your advise on it. 5) when they are eating..Dawn will eat standing up but Buster will be sitting down and eating. When I put them in my bath tub for their every day bath..I see Dawn swimming under water and enjoying her self..where as buster just dips his face into the water and just nibbles himself. Is there something wrong with him? how can I make him more active? also compared to Dawn..he is pretty big..is it normal for Pekins to be that size or is he getting over weight? This is all I can come up with..i will sure to ask again once i remember. thanks for the help.