Electrolytes

[OLDYELLOW]

I know in past this subject always tends to have a 50/50 split in opinions , i've always used electrolytes on return , here a valid point i'd like to get across , first two races I flew this season I believed the birds weren't watered properly and were looking for water on return , other than a few that came back a little later with grey silt on there legs these are birds that haven't previously been down before . Well where we fly the birds either come over the Humber online or they go inland and round , the Humber water is brackish and contains less salt than sea water , why would thirsty birds want salt ???? obviously to take on fluids and put there body back to balance or perhaps they were lacking salt to start with and couldn't store water because of the lack of salt in there diet been present