| CPC A01K 7/02 (2013.01) [A01K 11/00 (2013.01); A01K 11/006 (2013.01); A01K 29/00 (2013.01); A01K 29/005 (2013.01); A01K 39/012 (2013.01); C02F 1/008 (2013.01); C02F 1/461 (2013.01); G01N 33/18 (2013.01); B64U 10/13 (2023.01); B64U 2101/30 (2023.01); C02F 2103/20 (2013.01); C02F 2209/008 (2013.01); C02F 2209/04 (2013.01); C02F 2209/05 (2013.01); C02F 2209/06 (2013.01); C02F 2209/29 (2013.01); C02F 2209/40 (2013.01); C02F 2209/42 (2013.01)] | 26 Claims |

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1. A system for controlling water delivery to an animal water trough, the system comprising:
a radio-frequency tag adapted to be placed on an animal;
a first radio-frequency sensor adapted to detect the approach of an animal to a water trough;
a second radio-frequency sensor adapted to detect the arrival of an animal at the water trough, the second radio-frequency sensor having a shorter detection range than the first radio-frequency sensor; and
a processor adapted to determine whether an animal is approaching the water trough and inject treated water into the trough before the animal sticks its head in the water trough.
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