Hi Kevin,
Plums, nectarines and peaches are fine for them.
Below is a list of flowers/plants which are unsafe for chickens so dont give them any of these:
ARUM LILY
AMARYLLIS
ARALIA
ARROWHEAD VINE
AUTUMN CROCUS
AUSTRALIAN FLAMETREE
AUSTRALIAN UMBRELLA TREE
AVOCADO
AZALEA
BANEBERRY
BEANS: (CASTOR, HORSE, FAVA, BROAD, GLORY, SCARLET RUNNER,
MESCAL, NAVY, PREGATORY)
BIRD OF PARADISE
BISHOP'S WEED
BLACK LAUREL
BLACK LOCUST
BLEEDING HEART OR DUTCHMAN'S BREECHES
BLOODROOT
BLUEBONNET
BLUEGREEN ALGAE
BOXWOOD
BRACKEN FERN
BUCKTHORN
BULB FLOWERS: (AMARYLLIS, DAFFODIL, NARCISSUS, HYACINTH & IRIS)
BURDOCK
BUTTERCUP
CACAO
CAMEL BUSH
CASTOR BEAN
CALADIUM
CANA LILY
CARDINAL FLOWER
CHALICE (TRUMPET VINE)
CHERRY TREE
CHINA BERRY TREE
CHRISTMAS CANDLE
CLEMATIS (VIRGINIA BOWER)
CLIVIA
COCKLEBUR
COFFEE (SENNA)
COFFEE BEAN (RATTLEBUSH, RATTLE BOX & COFFEEWEED)
CORAL PLANT
CORIANDER
CORNCOCKLE
COYOTILLO
COWSLIP
CUTLEAF PHILODENDRON
DAFFODIL
DAPHNE
DATURA STRAMONIUM (ANGEL'S TRUMPET)
DEATH CAMUS
DELPHINIUM
DEVIL'S IVY
DIEFFENBACHIA (DUMB CANE)
ELDERBERRY
ELEPHANT EAR (TARO)
ENGLISH IVY
ERGOT
EUCALYPTUS (DRIED, DYED OR TREATED IN FLORAL ARRANGEMENTS)
EUONYMUS (SPINDLE TREE)
EUPHORBIA CACTUS
FALSE HELLEBORE
FLAME TREE
FELT PLANT (MATERNITY, AIR & PANDA PLANTS)
FIG (WEEPING)
FIRE THORN
FLAMINGO FLOWER
FOUR O'CLOCK
FOXGLOVE
GLOTTIDIUM
GOLDEN CHAIN
GRASS: (JOHNSON, SORGHUM, SUDAN & BROOM CORN)
GROUND CHERRY
HEATHS: (KALMIA, LEUCOTHO, PEIRES, RHODODENDRON, MTN. LAUREL,
BLACK LAUREL, ANDROMEDA & AZALEA)
HELIOTROPE
HEMLOCK: (POISON & WATER)
HENBANE
HOLLY
HONEYSUCKLE
HORSE CHESTNUT
HORSE TAIL
HOYA
HYACINTH
HYDRANGEA
IRIS IVY: (ENGLISH & OTHERS)
JACK-IN-THE-PULPIT
JASMINE (JESSAMINE)
JERUSALEM CHERRY
JIMSONWEED
JUNIPER
KY. COFFEE TREE
LANTANA (RED SAGE)
LARKSPUR
LILY OF THE VALLEY
LILY, ARUM
LOBELIA
LOCOWEED (MILK VETCH)
LOCUSTS, BLACK / HONEY
LORDS & LADIES (CUCKOOPINT)
LUPINE
MALANGA
MARIJUANA (HEMP)
MAYAPPLE (MANDRAKE)
MEXICAN BREADFRUIT
MEXICAN POPPY
MILKWEED, COTTON BUSH
MISTLETOE
MOCK ORANGE
MONKSHOOD
MOONSEED
MORNING GLORY
MTN. LAUREL
MUSHROOMS, AMANITA
MYRTLE
NARCISSUS
NETTLES
NIGHTSHADES: (DEADLY, BLACK, GARDEN, WOODY, BITTERSWEET,
EGGPLANT, JERUSALEM CHERRY)
OAK
OLEANDER
OXALIS
PARSLEY
PEACE LILY
PERIWINKLE
PHILODENDRONS: (SPLIT LEAF, SWISS CHEESE, HEART-LEAF)
PIGWEED
POINCIANA
POINSETTIA
POISON IVY
POISON HEMLOCK
POISON OAK: (WESTERN & EASTERN)
POKEWEED
POTATO SHOOTS
POTHOS
PRIVET
PYRACANTHA
RAIN TREE
RANUNCULUS, BUTTERCUP
RAPE
RATTLEBOX, CROTALARIA
RED MAPLE
RED SAGE (LANTANA)
RHUBARB LEAVES
RHODODENDRONS
ROSARY PEA SEEDS
SAND BOX TREE
SKUNK CABBAGE
SORREL (DOCK)
SNOW DROP
SPURGES: (PENCIL TREE, SNOW-ON-MTN, CANDELABRA, CROWN OF THORNS)
STAR OF BETHLEHEM
SWEET PEA
SWISS CHEESE PLANT (MONSTERA)
TANSY RAGWORT
TOBACCO
UMBRELLA PLANT
VETCH: HAIRY/COMMON
VIRGINIA CREEPER
WATTLE
WEEPING FIG
WHITE CEDAR, CHINA BERRY
WISTERIA
YEWS
YELLOW JASMINE
These foods are poisonous also:
[FONT=Arial, Helvetica, sans-serif][COLOR=#00000]1. [/COLOR]Raw potatoes and potato sprouts.[COLOR=#00000] Raw potatoes are hard for chickens to digetst while the green parts of potatoes and the sprouts are toxic.[/COLOR][/FONT]
[FONT=Arial, Helvetica, sans-serif][COLOR=#00000]2.[/COLOR] Rotten food.[COLOR=#00000] If the food is moldy, stinky, and gross, don't feed it to your chickens![/COLOR][/FONT]
[FONT=Arial, Helvetica, sans-serif][COLOR=#00000]3. [/COLOR]Raw peanuts and dried beans[COLOR=#00000]. (Dried beans are safe if they're cooked first.)[/COLOR][/FONT]
[FONT=Arial, Helvetica, sans-serif][COLOR=#00000]4. [/COLOR]Chocolate[COLOR=#00000]. Seems like MANY animals should stay away from chocolate...which is okay with me. I don't want to share my chocolate with them anyway![/COLOR][/FONT]
[FONT=Arial, Helvetica, sans-serif][COLOR=#00000]5. [/COLOR]Junk food.[COLOR=#00000] Yes, your chickens can eat it but it's not the most healthy. Will it kill them? Probably not. They might love it, but is it good for them? No more than it is for us.[/COLOR][/FONT]
[FONT=Arial, Helvetica, sans-serif][COLOR=#00000]6. [/COLOR]Some garden plant leaves[COLOR=#00000] such as eggplant, peppers, tomatoes and potatoes (usually chickens tend to stay away from these plants on their own).[/COLOR][/FONT]
[FONT=Arial, Helvetica, sans-serif][COLOR=#00000]7. [/COLOR]Tobacco and Alcohol[COLOR=#00000]. No partying out on the town with your birds! They can't take it. And nicotine is poisonous.[/COLOR][/FONT]
[FONT=Arial, Helvetica, sans-serif][COLOR=#00000]8. [/COLOR]Avocados[COLOR=#00000]. These can be fatal for your chickens.[/COLOR][/FONT]
[FONT=Arial, Helvetica, sans-serif][COLOR=#00000]9. [/COLOR]Some types of flower seeds[COLOR=#00000] such as sweet peas, morning glories and angel's trumpet.[/COLOR][/FONT]
[FONT=Arial, Helvetica, sans-serif][COLOR=#00000]10. [/COLOR]Raw meat.[COLOR=#00000] Chickens can eat meat (even chicken), but don't feed it to them raw because of risk of disease[/COLOR][/FONT]
[FONT=Arial, Helvetica, sans-serif][COLOR=#00000]BTW I think your barred rock is a girl[/COLOR][/FONT]