I started my 2 dogs on Nutra Thrive in June 2019 after watching the video. I purchased 3 jars and all went fine until I had to reorder in December. I have 1 6lb chihuahua and 1 20 lb schnauzer. So when I ordered 6 jars in December, I called to ask what the expiration dates are since only the lot number and MFG date is on the bottom of the jar. They told me to use the product within 1 year of the MFG date. So my 6 jars came Jan 6, with a MFG date of 1/28/19 and a lot number of 1802**-**. That means I have to use ALL 6 jars in less than a month. So I was really upset and called them and asked for a replacement of usable products. Today, Jan 15, I received the 6 jars with a MFG date of 1/30/2019 and a lot number of 1802**-**. So again now I have 12 jars of unusable product. I called again and asked to be refunded. No sense asking for jars within a date that I need. They told me they refunded me while I waited on the phone, but time will tell if they did. I kept all these jars and if I do not get refunded I will ship them all to the Better Business Bureau and open a claim. It is really important to know that the products MUST be used within that year, and if not you are wasting your money.