I buy the pet version that also has garlic. I figure it's safe because it's weighed out and geared towards pets. I get them really cheap. I get it at jefferspets.com. I get a bottle of 1000 for $6.95. That lasts a long time. Here is the link to what I give:
http://www.jefferspet.com/ssc/produc...TTFTNTPALNDC69