I've used Wysi, Watch Dog, Kennelsol, Trifectant, Accel/Rescue and of course bleach water solution throughout an 8 year period in sheltering.
Wysi's one pro for me was that it took away the human error part when it came to mixing, unless the capsule wasn't opened and water drained out after using. I found out that not draining the capsule would tend to give a higher concentration at the beginning of spraying and not draining also "ate" the product away a good deal faster. Cost wise Wysi is definitely friendly and I think application wise is fairly easy for staff, but the efficiency for staff was definitely a con - changing in and out of foamers/sprayers, having to utilize a different product for outbreaks, etc.
Watch Dog and Kennelsol I like to lump into the don't use category of my sheltering experience. I didn't see either product really staying on top of outbreaks nor did there seem to be an effective or efficient manner in which to apply to kennels.
Trifectant seemed to work ok with the felines, but there seemed to be room for human error when mixing.
Accel/Rescue I adore. It the one stop cleaning shop for a shelter or animal organization. Easy protocols for staff to follow, including daily use and outbreaks. Easy application. With the correct dispenser in place, limited room for human mixing error.
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