There are several tonics you can add.
Apple cider vinegar at a rate of two tablespoons per gallon is good for loosening up mucus in sick birds. It also helps prevent respiratory disease.
Stress tonic is available with extra vitamins
Many tonics are available with specific anti-biotic added.
You would need to be more specific about why your chickens need the tonic.
non tonic water
drinking water and rain water
Fresh water is used for drinking, whereas salt water can't be used.
total coliform bacteria
Tonic water used to contain a lot of quinine (bitter), which is used to prevent disease like malaria and fever. Nowadays, it's just a sweetened carbonated drink with relatively little quinine compared to before. It kind of tastes like grapefruit.
Tap water Drinking water Sewer water Pipe water River Water Mineral water Pure water Dirty water
distilled water, reverse osmosis water are the best kind of waters to drink compared to tap water
kangaroo rats can go a life time with out ever drinking any water.
Drinking,drinking and drinking
They preferred tonic-dominant-tonic (I - V - I) harmony.
Dr. F. Banishoraka recons that Apple can not replace water. consumption of 1 apple per day can be good addition to your daily diet , however drinking enough water is the most essential part of any ones daily diet. Choosing what kind of water to drink could be difficult, best choice is purified drinking water( Ro Water), please do not confuse drinking water with mineral water, as drinking 8-10 glasses(amonunt that is needed ) of mineral water instead of drinking water could have many side effects and extremely harmful, specially for Children and preagnent women and elderly.
she was coaght drinking a water melon milk shake with a bendey straw!