My biggest problem with all teething biscuits is they have SUGAR in them... I personally DO NOT want my 7month old daughter consuming something with SUGAR as the 2nd ingredient!! I found a great recipe that is easy and has NO Sugar or allergens!
1 cup fruit juice
1 cup flour
1 cup baby cereal
Put all ingredients into a mixing bowl and stir together until well combined. Roll out on a floured board and cut into shapes. Bake for approximately 20-30 minutes at 350°F (175°C). These biscuits can be frozen for storage and your baby might even enjoy sucking on a partially defrosted one.
there are others I found when i searched.... just thought anyone else who was concerned might be interested.