The Poisoned Wine

number all bottles from 1-1000 and translate that number to binary. add zeros to the number such that every bottle will correspond to a unique 10 digit binary number (for example bottle 100=0000000100). now number each rat from 1-10. now give each bottle with 1's in the nth digits to the corresponding rats (for example bottle 1000100000 would be given to rats 1 and 5 because it has 1 in the 1st and 5th digits). after an hour check which rats died and match their number to the bottle with the corresponding serial number, thats the poison bottle (for example if rats 3, 4, 7 died the poison is in bottle 0011001000)